Anmelden

Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.

The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a unitless quantity. The standard for measuring the intensity level is taken as the intensity at which human ears can barely hear a sound, 10−12 watt per square meter. The human eardrum is only about one square centimeter; hence, at the hearing threshold, it can process 10−16 watt of energy per second, demonstrating that the ear is an incredibly sensitive organ.

The intensity level is expressed in decibels, named after Alexander Graham Bell, who invented the telephone. On this scale, the threshold of pain is 120 decibels, and at a sound intensity greater than this, eardrums get damaged within seconds.

This text is adapted from Openstax, University Physics Volume 1, Section 17.3: Sound Intensity.

Tags

Sound IntensitySound WavesHuman PerceptionHearing ThresholdLogarithmic ScaleDecibelsEardrum SensitivityIntensity LevelSound SourcesPain Threshold

Aus Kapitel 17:

article

Now Playing

17.8 : Sound Intensity Level

Sound

4.1K Ansichten

article

17.1 : Schallwellen

Sound

7.3K Ansichten

article

17.2 : Schall als Druckwellen

Sound

1.2K Ansichten

article

17.3 : Wahrnehmung von Schallwellen

Sound

4.4K Ansichten

article

17.4 : Schallgeschwindigkeit in Feststoffen und Flüssigkeiten

Sound

2.8K Ansichten

article

17.5 : Schallgeschwindigkeit in Gasen

Sound

2.9K Ansichten

article

17.6 : Ableitung der Schallgeschwindigkeit in einer Flüssigkeit

Sound

443 Ansichten

article

17.7 : Lautstärke

Sound

4.0K Ansichten

article

17.9 : Intensität und Druck von Schallwellen

Sound

997 Ansichten

article

17.10 : Schallwellen: Interferenz

Sound

3.6K Ansichten

article

17.11 : Überlagerung: Weglängen

Sound

1.2K Ansichten

article

17.12 : Schallwellen: Resonanz

Sound

2.5K Ansichten

article

17.13 : Beats

Sound

467 Ansichten

article

17.14 : Doppler-Effekt - I

Sound

3.5K Ansichten

article

17.15 : Doppler-Effekt - II

Sound

3.3K Ansichten

See More

JoVE Logo

Datenschutz

Nutzungsbedingungen

Richtlinien

Forschung

Lehre

ÜBER JoVE

Copyright © 2025 MyJoVE Corporation. Alle Rechte vorbehalten